With the new Directed DSM300 or DSM350 Smart Start Module you can now add Smart Start to your existing Python, Viper or Avital Remote Starter System already installed in your vehicle. It upgrades your present remote start system to a "2-way" system on your Smart Phone. Applies to Python or Viper Models installed since 2004, and to Avital Models installed in 2009 or later. See pricing below.